[MAINTENANCE] Use TYPO3 DateFormatter for date formatting in SolrCoreStatus

Author: fschoelzel

Classes/Hooks/Form/FieldInformation/SolrCoreStatus.php

@@ -15,6 +15,7 @@
 use Kitodo\Dlf\Common\Helper;
 use Kitodo\Dlf\Common\Solr\Solr;
 use TYPO3\CMS\Backend\Form\AbstractNode;
+use TYPO3\CMS\Core\Localization\DateFormatter;
 use TYPO3\CMS\Core\Messaging\FlashMessage;
 
 /**
@@ -37,6 +38,7 @@ class SolrCoreStatus extends AbstractNode
     public function render(): array
     {
         $result = $this->initializeResultArray();
+        $dateFormatter = new DateFormatter();
         // Show only when editing existing records.
         if ($this->data['command'] !== 'new') {
             $core = $this->data['databaseRow']['index_name'];
@@ -57,8 +59,8 @@ public function render(): array
                     $dateTimeTo = new \DateTime("@$uptimeInSeconds");
                     $uptime = $dateTimeFrom->diff($dateTimeTo)->format('%a ' . Helper::getLanguageService()->getLL('flash.days') . ', %H:%I:%S');
                     $numDocuments = $response->getNumberOfDocuments();
-                    $startTime = $response->getStartTime() ? strftime('%c', $response->getStartTime()->getTimestamp()) : 'N/A';
-                    $lastModified = $response->getLastModified() ? strftime('%c', $response->getLastModified()->getTimestamp()) : 'N/A';
+                    $startTime = $response->getStartTime() ? $dateFormatter->strftime('%c', $response->getStartTime()->getTimestamp(), Helper::getLanguageService()->lang) : 'N/A';
+                    $lastModified = $response->getLastModified() ? $dateFormatter->strftime('%c', $response->getLastModified()->getTimestamp(), Helper::getLanguageService()->lang) : 'N/A';
                     // Create flash message.
                     Helper::addMessage(
                         sprintf(Helper::getLanguageService()->getLL('flash.coreStatus'), $startTime, $uptime, $lastModified, $numDocuments),